Telegraph-repeater.



1. McKEON.

TELEGRAPH REPEATER.

I APPLICATION FILED NOV. 6, I914. 1,147,636. Patented July 20, 1915.

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J. McKEON.

TELEGRAPH REPEATER.

APPLICATlON FILED Nov. 6. 1914.

1,147,636. Patented July 20, 1915.

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JOHN McKEON, OF GREAT FALLS, MONTANA.

TELEGRAPH-REPEATER.

Specification of Letters Patent.

Patented July 20, 1915 Application filed November 6, 1914. Serial .No. 870,672.

To all whom it may concern:

Be it known that 1, JOHN MoKnoN, a citizen of the United States of America, residing at Great Falls, in the county of Cascade and State of Montana, have invented new and useful Improvements in T elegraph-Repeaters, of which the following is a specification. y

This invention relates to improvements in telegraph repeaters and has particular ap plication to a repeater whereby signals or1g1- nating in one circuitinay be reproduced 1n another independent circuit by alternately interrupting and restoring the flow of electric current from the battery or other source of electrical energy.

In carrying out the present invention, it is my purpose to improve and simplify the general construction of telegraph repeaters and to provide a repeater, which will embody among other features, main line and local relay magnets normally energized by means of heavy and light currents respectively and having the poles thereof confronting each other and spaced apart and controlling an armature disposed between such poles and capable of'swinging movement, and leaf springs insulated from one another and spaced apart in parallelism and disposed in the path of movement of the armature and carrying contacts respectively adapted to move with the springs and normally engaging companion contacts, the springs being actuated successively when the heavy current main line relay magnet is deenergized and the light current local relay magnet remains energized so that the contacts will be separated one after another.

With the above and other objects in view, the invention consists in the construction, combination and arrangement of parts hereinafter set forth in and falling within the scope of the claims.

In the accompanying drawings; Figure 1 is a view in side elevation of a telegraph repeater constructed in accordance with the present invention. Fig. 2 is a top plan view thereof. Fig. 3 is an enlarged fragmentary side elevationof the repeater showing the arrangement of the contact springs and armature. Fig. 4 is a diagrammatic view showing the circuit connections between two main lines and a set of repeaters con structed in accordance with the present invention. Fig. 5 is a similar view showing my improved repeater as connecting a single wire telegraph line with a duplex line. 1

Referring now-to thedrawings in detail,

A designates my improved telegraph repeater as an entirety, such repeater compris' mg a base 1 constructed of suitable insulat- 6 are connected with a block 7 in which is swiveled an adjusting screw 8 threaded through an opening in the upper end of a post 9 uprising from the base 1. By means of the adjusting screws 8, the magnets 5 and 6 may be moved longitudinally within the spectacles a and 8' so that the distance between the poles faces thereof may be varied, suitablemeans being provided to maintain the magnets in the desired adjusted position. As usual, the magnets 5 are connected in series with each other and the free terminals thereof are respectively connected with binding posts 10,, while the magnets 6 are likewise connected with each other and have the free terminals thereof tapered onto binding posts 11 respectively.

Disposed between the confronting faces of the magnets 5 and 6 isavertical lever 12 having the lower end thereof pivoted within a bearing 13 securedto the upper surface of the base 1, and fastened to the lever 12 is an armature 14L disposed within'the influence of the poles of the magnets 5 and 6. Rigidly secured to the base 1 and upstanding therefrom between the lever 12 and the magnets 6 is a leaf spring 15 disposed parallel with the lever 12 and of a length equal to that of the lever 12 and having the upper end thereof bearing against the lever 12 A contact 16 is carried by the adjacent end of the lever 12 and normally engages a'contact16 carried by an adj ustable screw 17 threaded through an opening in an arm 18 upstanding from the spectacle 4;. Also rigidly secured to the base 1 and upstanding therefrom between the leaf spring 15 and the magnets 6 is a relatively thick leaf spring 18 of a length slightly greater than that of the spring 15 and having the upper end thereof equipped with a contact 19 adapted to engage a contact 20 carried by an adjusting screw 21 threaded through an opening in the arm 18 above the adjusting screw 17.

In Fig. t of the drawings, 1 have shown two telegraph repeaters forming a set and connected with the terminals of two telegraph lines, such lines being designated east and west respectively, for convenience, and interconnected so that the signals originating in one line may be reproduced in the other line and vice versa. The repeaters are indicated at B and G respectively and the west telegraph line extends through the spring 18, contacts 19 and 20 and adjusting screw 21 of the repeater G, through the main line relay magnets 5 of the repeater B and then through a source of energy 22 to ground as at 23, while the east line extends through the contact spring 18, contacts 19 and 20 and adjusting screw 21, the repeater B, through the main line relay magnets 5 of repeater G and then through a source of energy 24 to ground as at 25. The local relay magnets 6 of repeater B are connected in a local circuit 26 extending through a source of energy 27 and the armature lever 12, contacts 16 and 16 and adjusting screw 17 of repeater C, while the local relay magnets 6 of the relay C are connected in a local circuit 28 including a suitable source of energy as a. battery 29 and extending through the armature lever 12, contacts 16 and 16 and adjusting screw 17 of repeater B. As is obvious, the main lines are normally closed and the current in the west line maintains the main line relay magnets of the repeater B normally energized, while the current from the east line extends through the main line relay magnets of the repeater C. The main line relay magnets are heavv current magnets, while the local circuit magnets respond to a light current and the local circuit of the local relay magnets of one repeater is maintained closed through the action of the main line relay magnet of the other repeater and vice versa. Consequently, the armatures are normally held in engagement with the poles of the main line relay magnets thereby maintaining the respective contacts in engagement with each other, and when the main line relay magnet of one repeater is deenergized the other relay magnet draws the armature into engagement with its pole face, thereby disengaging the respective contacts. For example, should the operator of the west line open the latter, the main line relay magnets 5 of the repeater B will be deenergized so that the action of the latter will be overcome by the energized local relay magnets 6 of such repeater, thereby swinging the lever 12 to disengage the contacts 16 and 19 from the contacts 16 and 20 respectively. In the initial movement of the lever 12 of the repeater B under the action of the local relay magnets 6, such lever moves the contacts 16 out of engagement with the contacts 16", thereby breaking the local circuit 28 of the relay magnets 6 of the repeater C, and in the continued movement of the lever 12 of the repeater B, the contact 19 is disengaged from the contact 20 thereby opening the east telegraph line so that the signal impulse originating in the west line will be reproduced in the east line. As the east line is. opened at the repeater B the main line relay magnets 5 of the repeater C are de'e'nergized, but as the local circuit of the relay magnets 6 of the repeater C has been broken at the repeater B, the contact springs, owing to their nature, hold the contacts 16 and 19 of the repeater G in engagement with the respective contacts 16 and 20. Thus, as the east telegraph line is alternately opened and closed, u

the impulses originating therein will be reproduced in the west line so that the signals may be repeated by the latter line.

In the diagram illustrated in Fig. 5, I have shown two repeaters D and E connected in a single wire telegraph line and in a duplex telegraph line and interconnected with each other so that the signals originated in one line may be reproduced in the other and vice versa. In this use of the invention, the single wire is extended through the main line relay magnets 5 of the repeater D and the adjusting screw 17, contacts 16 and 16, and armature lever 12 of relay E and then through a source of energy 30, to ground as at 31, while conductors 32 are connected respectively with the contact points of the neutral relay of the duplex apparatus and extend through the relay magnets 5 of the repeater E and the relay magnets 6 of the repeater D and include a, source of energy as battery 33. Leading from the adjusting screw 17 of the repeater D is a conductor 8 extending through the relay magnets 6 of the repeater E and terminally connected to one side of the transmitter coils of the duplex apparatus and from the remaining side of such coils leads a conductor 35 including a suitable source or" energy as a battery 36 and connected with the armature lever 12 of the repeater 1). Normally, the single wire is closed and the relay magnets 5 of repeater D energized, while the circuit composed of the conductors 32 is normally closed at the contact points of the polarized relay of the duplex apparatus and, the circuit to the transmitter coils held closed at the repeater D, incident to the heavy current magnets 5 opposing the light current magnets 6.

Should the single wire be opened, the magnets 5 of the repeater D will be denergized, thereby permitting the magnets 6 of the repeater D to swing the lever 12 and so separate the movable contacts from the stationary contact. In the initial movement of the lever under the action of the magnets 6 of the repeater D, the contacts 16 and 16 are disengaged, thereby denergizing the magnets 6 of the repeater E and breaking the circuit of the transmitter coils of the duplex apparatus. Thus, the signals sent over the single wire are reproduced by the transmitter coils of the duplex apparatus. It will be understood, of course, that when the single line is repeating into the duplex circuit, the circuit composed of the conductors 32 is held closed at the contact points of the neutral relay of the duplex apparatus, thereby maintaining the magnets 6 and 5 of the repeaters D and E energized. l/Vhen the common side of the duplex apparatus is sending into the single wire, the circuit composed of the conductors 32 is broken at the contact points of the neutral relay when the latter opens, thereby deenergizing the relays 6 and 5 of the repeaters D and E respectively. As the heavy current magnets 5 of the repeater E are deenergized, the light current relay magnets 6 of such repeater swing the lever 12 with the effect to open the single wire at the contacts 16, 16 of the repeater E, thereby reproducing the impulses originating in the duplex apparatus on the single wire. As the circuit through the single wire is broken the magnets 5 of the repeater D are denergized, but as the relay magnets 6 are also deenergized, incident to the opening of the circuit composed of the coils 32 at the contact points of the neutral relay, the spring 15 of the repeater D maintains the contacts 16 and 16 of such repeater in engagement.

When connecting a single wire telegraph line with a duplex circuit as in Fig. 5, the contacts 19 and 20 of the respective relays remain idle, while the heavy current relay magnets of the repeater connected with the neutral relay act as local circuit magnets.

While I have herein shown and described one preferred form of my invention by way of illustration, I wish it to be understood that I do not limit or confine myself to the precise details of construction herein described and delineated, as modification and variation may be made within the scope of the claims without departing from the spirit of the invention.

I claim:

1. A telegraph repeater comprising a heavy current relay magnet adapted to be connected with a main line and normally energized and a light current relay magnet adapted to be connected with a local circuit and normally energized, said magnets confronting each other and spaced apart, an armature disposed between the poles of said magnets and capable of swinging movement, a stationary contact, a movable contact engaging said stationary contact and carried by said armature, a spring engaging said armature and holding said contacts normally closed, a second stationary contact, a movable contact cooperating with said lastnamed contact, a spring carrying said second-named movable contact and spaced apart from said first spring in parallelism therewith and disposed in the path of move ment of said first spring so that the firstnamed contacts will be disengaged in the initial movement of the armature and the lastnamed contacts disengaged as the armature completes its movement under the action of said light current relay when the heavy current relay is 'deenergized.

2. A telegraph repeater comprising a heavy current relay magnet adapted to be connected with a main line and a light current relay magnet adapted to be connected with a local circuit and having the pole face thereof confronting the similar face of the first-mentioned magnet and spaced apart therefrom, a lever fulcrumed between said magnets and capable of swinging movement, an armature carried by said lever and common to the poles of said magnets, a stationary contact, a movable contact engaging said stationary contact and carried by said lever, a spring engaging said lever and holdstationary contact, a movable contact cooperating with said last-named stationary contact, a spring carrying said last-named movable contact and spaced apart from said first spring and disposed in parallelism therewith and in the path of movement thereof so that the first-named contacts will be disengaged in the initial movement of the armature and lever and the last-named contacts disengaged as the armature completes its movement under the action of said light current relay magnet when the heavy current relay magnet is deenergized.

In testimony whereof I affix my signature in presence of two witnesses.

MOKEON.

JOHN WVitnesses:

G. P. MALLoN, J. H.' MAYER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0.

mg said contacts normally closed, a second. 

